Color removal of distillery wastewater by ozonation in the absence and presence of immobilized iron oxide catalyst

Journal of Hazardous Materials
Thammanoon Sreethawong, Sumaeth Chavadej

Abstract

Ozone is a strong oxidant, which can oxidize both biodegradable and non-biodegradable organics. The main objective of this study was to use iron oxide as a heterogeneous catalyst to enhance the ozone oxidation process. The wastewater used in this study was distillery wastewater, which was diluted 20 times before use. The diluted distillery wastewater was fed continuously in a downflow direction in an ozonation column. The iron oxide catalyst was coated on 10.3mm diameter alumina balls (5.5 m2/g specific surface area) by using Fe(NO3)3 as a precursor. The prepared catalyst was in the form of ferric oxide, and its loading was 0.07%. From the experimental results of both with and without the iron oxide catalyst, an increase in hydraulic retention time resulted in an increase in the treatment efficiencies of both chemical oxygen demand (COD) and color reduction, since the residence time of ozone increased. When the ozone mass flow rate increased, both COD and color reduction increased, resulting from an increase in the hydroxyl radical available in the system. The ozonation system with the iron oxide catalyst gave the highest efficiency in both COD and color removals because the hydroxyl free radical generated from the catalyst is ...Continue Reading

References

Jan 25, 2002·Chemosphere·M KochA Kettrup
Aug 13, 2005·Water Research·Fernando J BeltránR Montero-de-Espinosa
Aug 17, 2005·Journal of Environmental Management·Preeti C Sangave, Aniruddha B Pandit
Jun 8, 2006·Water Research·Sanna Kotrappanavar NatarajTejraj M Aminabhavi
Nov 10, 2006·Bioresource Technology·Deepak Pant, Alok Adholeya
Mar 27, 2007·Bioresource Technology·Y Satyawali, M Balakrishnan

❮ Previous
Next ❯

Citations

Apr 17, 2012·Journal of Hazardous Materials·K V PadoleyAniruddha B Pandit
Sep 24, 2011·Journal of Biotechnology·Vania Robles-GonzálezHéctor M Poggi-Varaldo
Feb 19, 2011·Journal of Hazardous Materials·J A SilesM A Martín
Feb 5, 2015·Environmental Science and Pollution Research International·Chunmao ChenGuangxu Yan
Jan 19, 2011·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Elda España-GamboaLiliana Alzate-Gaviria
Feb 1, 2018·Environmental Science and Pollution Research International·Zhiyong BaiQi Yang

❮ Previous
Next ❯

Related Concepts

Related Feeds

Blood Clotting Disorders

Thrombophilia includes conditions with increased tendency for excessive blood clotting. Blood clotting occurs when the body has insufficient amounts of specialized proteins that make blood clot and stop bleeding. Here is the latest research on blood clotting disorders.